HR: 1340h
AN: A13A-0092    [Abstracts]
TI: CO2 and CO simulations and their source signature indicated by CO/CO2
AU: Kawa, S R
EM: kawa@maia.gsfc.nasa.gov
AF: Gaddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD 20771 United States
AU: * Bian, H
EM: bian@code916.gsfc.nasa.gov
AF: Gaddard Earth Sciences and Techology Center/University of Maryland, Baltimore County, Gaddard Space Flight CenterGaddard Space Flight Center, NASA, Greenbelt, MD 20771 United States
AB: Three years (2000-2002) atmospheric CO2 and CO fields are simulated by a Chemistry Transport Model driven by the assimilated meteorological fields from GEOS\_4. The simulated CO2 and CO are evaluated by measurements from surface (CMDL), satellite (MOPITT/CO), and aircraft. The model-observation comparisons indicate reasonable agreement in both source and remote regions, and in the lower and upper troposphere. The simulation also captures the seasonality of CO2 and CO variations. The ratios of CO/CO2 are analyzed over different representative regions to identify the source signature, since the anthropogenic CO comes from the same combustion processes as CO2. This work enables us to improve satellite inversion estimates of CO2 sources and sinks by simultaneously using satellite CO measurement.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting